package com.collections;

import java.util.HashMap;
import java.util.Hashtable;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

public class CollectionTest {

	List list = new LinkedList();
	Map map = new LinkedHashMap();
	Set set = new LinkedHashSet();
	static Map map2 = new ConcurrentHashMap();
	Map map3 = new HashMap();
	Hashtable table = new Hashtable();
	
	public static void main(String[] args){
		map2.put("1", 1);
	}
}
